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LTC2858IMS-2#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
4
285678ff
For more information www.linear.com/LTC2856-1
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Driver
|V
OD
| Differential Driver Output Voltage R = ∞, V
CC
= 4.5V (Figure 1)
l
V
CC
V
R = 27Ω (RS485), V
CC
= 4.5V (Figure 1)
l
1.5 V
CC
V
R = 50Ω (RS422), V
CC
= 4.5V (Figure 1)
l
2 V
CC
V
Δ|V
OD
|
Change in Magnitude of Driver Differential
Output Voltage for Complementary Output
States
R = 27Ω or R = 50Ω (Figure 1)
l
0.2 V
V
OC
Driver Common Mode Output Voltage
R = 27Ω or R = 50Ω (Figure 1)
l
3 V
Δ|V
OC
|
Change in Magnitude of Driver Common Mode
Output Voltage for Complementary Output
States
R = 27Ω or R = 50Ω (Figure 1)
l
0.2 V
I
OZD
Driver Three-State (High Impedance) Output
Current on Y and Z
DE = 0V, (Y or Z) = –7V, 12V, LTC2858-1,
LTC2858-2
l
±10 µA
I
OSD
Maximum Driver Short-Circuit Current –7V ≤ (Y or Z) ≤ 12V (Figure 2)
l
±120 ±250 mA
Receiver
I
IN
Receiver Input Current (A, B) DE = TE = 0V, V
CC
= 0V or 5V, V
IN
= 12V
(Figure 3) (C, I-Grade)
DE = TE = 0V, V
CC
= 0V or 5V, V
IN
= –7V,
(Figure 3) (C, I-Grade)
l
l
–100
125 µA
µA
DE = TE = 0V, V
CC
= 0V or 5V, V
IN
= 12V
(Figure 3) (H-Grade)
DE = TE = 0V, V
CC
= 0V or 5V, V
IN
= –7V,
(Figure 3) (H-Grade)
l
l
–145
250 µA
µA
R
IN
Receiver Input Resistance RE = V
CC
or 0V, DE = TE = 0V,
V
IN
= –7V, –3V, 3V, 7V, 12V (Figure 3)
(C, I-Grade)
l
96 125
kΩ
RE = V
CC
or 0V, DE = TE = 0V,
V
IN
= –7V, –3V, 3V, 7V, 12V (Figure 3)
(H-Grade)
l
48 125
kΩ
V
TH
Receiver Differential Input Threshold Voltage –7V ≤ B ≤ 12V
l
±0.2 V
ΔV
TH
Receiver Input Hysteresis B = 0V 25 mV
V
OH
Receiver Output High Voltage I(RO) = –4mA, A-B = 200mV, V
CC
= 4.5V
l
2.4 V
V
OL
Receiver Output Low Voltage I(RO) = 4mA, A-B = –200mV, V
CC
= 4.5V
l
0.4 V
I
OZR
Receiver Three-State (High Impedance) Output
Current on RO
RE = 5V, 0V ≤ RO ≤ V
CC
, LTC2856-1,
LTC2856-2, LTC2858-1, LTC2858-2
l
±1 µA
Logic
V
IH
Logic Input High Voltage DE, DI, RE, V
CC
= 5.5V
l
2 V
V
IL
Logic Input Low Voltage DE, DI, RE, V
CC
= 4.5V
l
0.8 V
I
INL
Logic Input Current DE, DI, RE
l
0 ±10 µA
Supplies
I
CCS
Supply Current in Shutdown Mode DE = 0V, RE = V
CC
,
LTC2856, LTC2858 (C and I-Grade)
LTC2856, LTC2858 (H-Grade)
l
l
0
0
5
15
µA
µA
I
CCR
Supply Current in Receive Mode No Load, DE = 0V, RE = 0V, LTC2856-1,
LTC2856-2, LTC2858-1, LTC2858-2
l
540 900 µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise noted. (Note 2)
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
5
285678ff
For more information www.linear.com/LTC2856-1
swiTching characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
CCT
Supply Current in Transmit Mode No Load, DE = V
CC
,
RE = V
CC
LTC2856-1
LTC2858-1
l
630 1000 µA
LTC2856-2
LTC2858-2
l
670 1100 µA
I
CCTR
Supply Current with Both Driver and Receiver
Enabled
No Load, DE = V
CC
,
RE = 0V
LTC2856-1
LTC2857-1
LTC2858-1
l
660 1100 µA
LTC2856-2
LTC2857-2
LTC2858-2
l
700 1200 µA
Driver in LTC2856-1, LTC2857-1, LTC2858-1
f
MAX
Maximum Data Rate (Note 3)
l
20 Mbps
t
PLHD
, t
PHLD
Driver Input to Output
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
10 50 ns
Δt
PD
Driver Input to Output Difference |t
PLHD
– t
PHLD
|
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
1 6 ns
t
SKEWD
Driver Output Y to Output Z
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
1 ±6 ns
t
RD
, t
FD
Driver Rise or Fall Time
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
4 12.5 ns
t
ZLD
, t
ZHD
,
t
LZD
, t
HZD
Driver Enable or Disable Time
R
L
= 500Ω, C
L
= 50pF, RE = 0V,
LTC2856-1, LTC2858-1 (Figure 5)
l
70 ns
t
ZHSD
, t
ZLSD
Driver Enable from Shutdown
R
L
= 500Ω, C
L
= 50pF, RE = V
CC
,
LTC2856-1, LTC2858-1 (Figure 5)
l
8 µs
t
SHDN
Time to Shutdown
(DE = ↓, RE = V
CC
) or (DE = 0V, RE = ↑),
LTC2856-1, LTC2858-1 (Figure 5)
l
100 ns
Driver in LTC2856-2, LTC2857-2, LTC2858-2
f
MAXS
Maximum Data Rate (Note 3)
l
250 kbps
t
PLHDS
, t
PHLDS
Driver Input to Output
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
0.95 1.5 µs
Δt
PDS
Driver Input to Output Difference |t
PLHD
– t
PHLD
|
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
50 500 ns
t
SKEWDS
Driver Output A to Output B
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
200 ±500 ns
t
RDS
, t
FDS
Driver Rise or Fall Time
R
DIFF
= 54Ω, C
L
= 100pF (Figure 4)
l
0.90 1.5 µs
t
ZHDS
, t
ZLDS
Driver Enable Time
R
L
= 500Ω, C
L
= 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
l
300 ns
t
LZDS
, t
HZDS
Driver Disable Time
R
L
= 500Ω, C
L
= 50pF, RE = 0V,
LTC2856-2, LTC2858-2 (Figure 5)
l
70 ns
t
ZHSDS
, t
ZLSDS
Driver Enable from Shutdown
R
L
= 500Ω, C
L
50pF, RE = V
CC
,
LTC2856-2, LTC2858-2 (Figure 5)
l
8 µs
t
SHDNS
Time to Shutdown
(DE = 0V, RE↑) or (DE = ↓, RE = V
CC
),
LTC2856-2, LTC2858-2 (Figure 5)
l
500 ns
Receiver
t
PLHR
, t
PHLR
Receiver Input to Output C
L
= 15pF, V
CM
= 1.5V, |V
AB
| = 1.5V,
t
R
and t
F
< 4ns (Figure 6)
l
50 70 ns
t
SKEWR
Differential Receiver Skew, |t
PLHR
– t
PHLR
| C
L
= 15pF (Figure 6)
l
1 6 ns
t
RR
, t
FR
Receiver Output Rise or Fall Time C
L
= 15pF (Figure 6)
l
3 12.5 ns
t
ZLR
, t
ZHR
,
t
LZR
, t
HZR
Receiver Enable/Disable R
L
= 1k, C
L
= 15pF, DE = V
CC
,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
l
50 ns
t
ZHSR
, t
ZLSR
Receiver Enable from Shutdown R
L
= 1k, C
L
= 15pF, DE = 0V,
LTC2856-1, LTC2856-2, LTC2858-1,
LTC2858-2 (Figure 7)
l
8 µs
LTC2856-1/LTC2856-2
LTC2857-1/LTC2857-2
LTC2858-1/LTC2858-2
6
285678ff
For more information www.linear.com/LTC2856-1
TesT circuiTs
–
+
DRIVER
DI
GND
OR
V
CC
R
285678 F01
Y
Z
R
V
OC
–
+
V
OD
Figure 1. Driver DC Characteristics Figure 2. Driver Output Short-Circuit Current
DRIVER
DI
GND
OR
V
CC
285678 F02
Y
Z
+
–
I
OSD
–7V TO +12V
+
–
RECEIVER
285678 F03
A OR B
V
IN
I
IN
B OR A
V
IN
I
IN
R
IN
=
Figure 3. Receiver Input Current and Input Resistance
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime. High temperatures degrade operating lifetimes.
Operating lifetime is derated at temperatures greater than 105°C.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
Note 3: Maximum data rate is guaranteed by other measured parameters
and is not tested directly.
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Overtemperature protection actives at a junction temperature exceeding
150°C. Continuous operation above the specified maximum operating
junction temperature may result in device degradation or failure.
elecTrical characTerisTics
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC2858IMS-2#TRPBF

Mfr. #:
Buy LTC2858IMS-2#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
RS-422/RS-485 Interface IC 5V Full-Duplex 250kbps RS485 Transceiver w/ Enables
Lifecycle:
New from this manufacturer.
Delivery:
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